Failed ROM v215 update on HP50g

Post by #5
Hello,
I updated my ROM to v215 to get rid of the ROM compiled with HPGCC3.
I used the conn4x_b2361 for the update and everything looked ok ( the only thing i didn't do in the update process was to disconnect the USB)
I pressed enter at the end and it asked me if i wanted to recover memory, i said no. The calculator looked similar as it had been turned off, but it was not responding to any keys and making a beep sound.
When i remove one battery or reset the calculator i get the "try to recover memory" window. I tried no and yes and the same thing happens.
Any idea on how could i recover my calculator?
Thanks in advance.

Hello,

PUSH AND HOLD the DELETE-KEY (the key right of SMYB).
USE A PAPER CLIP to PUSH the reset-button (next to the serial number on the back side of the calculator).
RELEASE FOR AN INSTANT the DELETE-KEY
---> calculator should boot without using libs.
---> delete libs of port2 (push LEFT-KEY and "FILES" (APPS-KEY)).

or

PUSH ON-KEY AND C-KEY or PUSH ON-KEY AND A-KEY AND F-KEY
PUSH AND HOLD the DELETE-KEY (the key right of SMYB).
---> calculator should boot without using libs.
---> delete libs of port2 (push LEFT-KEY and "FILES" (APPS-KEY)).

did it work?

2023-02-01 02:38:09 UTC

Hello,
PUSH AND HOLD the DELETE-KEY (the key right of SMYB).
USE A PAPER CLIP to PUSH the reset-button (next to the serial number on the back side of the calculator).
RELEASE FOR AN INSTANT the DELETE-KEY
---> calculator should boot without using libs.
---> delete libs of port2 (push LEFT-KEY and "FILES" (APPS-KEY)).
or
PUSH ON-KEY AND C-KEY or PUSH ON-KEY AND A-KEY AND F-KEY
PUSH AND HOLD the DELETE-KEY (the key right of SMYB).
---> calculator should boot without using libs.
---> delete libs of port2 (push LEFT-KEY and "FILES" (APPS-KEY)).
did it work?

Thanks a lot for your help, but all i get is "try to recover memory?"
:O(

Bruce Horrocks

2023-02-01 17:54:31 UTC

Post by m p
did it work?

Thanks a lot for your help, but all i get is "try to recover memory?"
:O(

Do you have a suitable SD card: 2GB (might be 4GB) or smaller, formatted
as FAT but not FAT32? If so then there is a way to upgrade the firmware
via the SD card and no need for USB.

Instructions are here: <https://www.hpcalc.org/hp49/pc/rom/>

Where the instructions say to copy the "update.scp" and "bin" files onto
the SD card, you can get those file from the Zip file here:
<https://www.hpcalc.org/details/7097>

I don't think it would do any harm to unzip all the files into the SD
card, as long as they are all at the top level and not in a sub-directory.

That zip also contains installation instructions which are slightly
different. I would start with the ones on the link I posted first.

--
Bruce Horrocks
Surrey, England

2023-02-02 00:31:52 UTC

Post by m p
did it work?

Thanks a lot for your help, but all i get is "try to recover memory?"
:O(

Do you have a suitable SD card: 2GB (might be 4GB) or smaller, formatted
as FAT but not FAT32? If so then there is a way to upgrade the firmware
via the SD card and no need for USB.
Instructions are here: <https://www.hpcalc.org/hp49/pc/rom/>
Where the instructions say to copy the "update.scp" and "bin" files onto
<https://www.hpcalc.org/details/7097>
I don't think it would do any harm to unzip all the files into the SD
card, as long as they are all at the top level and not in a sub-directory.
That zip also contains installation instructions which are slightly
different. I would start with the ones on the link I posted first.
--
Bruce Horrocks
Surrey, Engla

i dID it!! firstly i reloaded the rom two times, still "want to recover memory".. then i tried the one with the 2 MB fixed thing.
Then i pushed del and reset and seems to be working.
Thanks a lot Bruce Horrocks and m p
#5

2023-02-02 00:54:31 UTC

Post by m p
did it work?

Thanks a lot for your help, but all i get is "try to recover memory?"
:O(

Do you have a suitable SD card: 2GB (might be 4GB) or smaller, formatted
as FAT but not FAT32? If so then there is a way to upgrade the firmware
via the SD card and no need for USB.
Instructions are here: <https://www.hpcalc.org/hp49/pc/rom/>
Where the instructions say to copy the "update.scp" and "bin" files onto
<https://www.hpcalc.org/details/7097>
I don't think it would do any harm to unzip all the files into the SD
card, as long as they are all at the top level and not in a sub-directory.
That zip also contains installation instructions which are slightly
different. I would start with the ones on the link I posted first.
--
Bruce Horrocks
Surrey, Engla

Now ( of course ) my batteries are low. should i change just the stick batteries or should i change the disk battery as well?

Bruce Horrocks

2023-02-03 02:36:23 UTC

Post by m p
did it work?

Thanks a lot for your help, but all i get is "try to recover memory?"
:O(

Do you have a suitable SD card: 2GB (might be 4GB) or smaller, formatted
as FAT but not FAT32? If so then there is a way to upgrade the firmware
via the SD card and no need for USB.
Instructions are here: <https://www.hpcalc.org/hp49/pc/rom/>
Where the instructions say to copy the "update.scp" and "bin" files onto
<https://www.hpcalc.org/details/7097>
I don't think it would do any harm to unzip all the files into the SD
card, as long as they are all at the top level and not in a sub-directory.
That zip also contains installation instructions which are slightly
different. I would start with the ones on the link I posted first.
--
Bruce Horrocks
Surrey, Engla

Now ( of course ) my batteries are low. should i change just the stick batteries or should i change the disk battery as well?

Good news that it worked.

Change the main batteries first. If the low battery indicator stays on
then it means that the coin cell battery is also low.

--
Bruce Horrocks
Surrey, England

optic...@mindspring.com

2023-02-03 14:57:09 UTC

Post by m p
did it work?

Thanks a lot for your help, but all i get is "try to recover memory?"
:O(

Do you have a suitable SD card: 2GB (might be 4GB) or smaller, formatted
as FAT but not FAT32? If so then there is a way to upgrade the firmware
via the SD card and no need for USB.
Instructions are here: <https://www.hpcalc.org/hp49/pc/rom/>
Where the instructions say to copy the "update.scp" and "bin" files onto
<https://www.hpcalc.org/details/7097>
I don't think it would do any harm to unzip all the files into the SD
card, as long as they are all at the top level and not in a sub-directory.
That zip also contains installation instructions which are slightly
different. I would start with the ones on the link I posted first.
--
Bruce Horrocks
Surrey, Engla

Now ( of course ) my batteries are low. should i change just the stick batteries or should i change the disk battery as well?

Good news that it worked.
Change the main batteries first. If the low battery indicator stays on
then it means that the coin cell battery is also low.
--
Bruce Horrocks
Surrey, England

I suggest changing the coin battery anyway, and do that first; if the calculator runs at all then the main batteries will keep the memory alive during the coin-battery change. Then change the main batteries. Or maybe I’m confused ...
Irl Smith, Concord, MA, USA

Bruce Horrocks

2023-02-03 20:45:53 UTC

Post by ***@mindspring.com